Neil deGrasse Tyson isn’t taking anymore of that Flat Earther nonsense from rapper B.o.B., appearing on The Nightly Show With Larry Wilmore to put the feud to bed with a mic-dropping diss of interstellar proportions.

A quick recap of the beef: B.o.B. and Tyson got into it on Twitter after the rapper claimed that the Earth is clearly flat, refusing to listen to any argument to the contrary. B.o.B. even escalated the rivalry by putting out a diss track, prompting Tyson to respond with one of his own. This culminated with an appearance on The Nightly Show With Larry Wilmore, as Tyson hits the stage, removes his jacket, and proceeds to rip into B.o.B. over his increasingly ridiculous theories about the universe. And when it’s all said and done? Tyson drops the mic with a killer line. Granted, this isn’t really a diss track, more just Tyson ranting about B.o.B. onstage. But this really has to be seen to be believed. Seriously, so awesome. Watch the video below:

What did you think of Neil deGrasse Tyson’s response to B.o.B.? Sound off in the comments!